<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
  <style>
    div{/*块级元素:独占一行,可以修改宽高*/
      width: 100px;
      height: 100px;
      border: 1px solid red;
    }
    span{/*行内元素,共占一行,不能修改宽高*/
      width: 100px;
      height: 100px;
      border: 1px solid blue;
    }
    img{/*行内块元素可以修改宽高,并且共占一行*/
      width: 100px;
      height: 100px;

    }
    a{
        background-color: #0aa1ed;
        /*因为超链接是行内元素,无法直接修改宽高,
        如需修改, 必须将元素的显示方式改成块级或行内块*/
        display: block;
        width: 132px;height: 40px;
        text-align: center;
        line-height: 40px;
        color: white;
        text-decoration: none;
        font-size: 20px;
        border-radius: 3px;/*设置圆角 值越大越园*/
    }
  </style>
</head>
<body>
<a href="">查看详情</a>
<img src="../b.jpg">
<img src="../b.jpg">
<img src="../b.jpg">
<div>div1</div>
<div>div2</div>
<div>div3</div>
<span>span1</span>
<span>span2</span>
<span>span3</span>
</body>
</html>